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From Covalent Triazine-based Framework to N-doped Porous Carbon/Reduced Graphene Oxide Nanosheets: Efficient Electrocatalysts for Oxygen Reduction

Abstract

By selecting 4,4’-dicyanobiphenyl (DCBP) as a building block, porous covalent triazine-based frameworks (CTFs) incorporating pyridinic N only have been deliberately fabricated. Upon pyrolysis, the CTF-templated N-doped and hierarchically porous carbons (NHCs) exhibit high surface area, adjustable pore structure and well-controlled doping of pyridinic and graphitic N species. The above CTFs have been rationally grown onto highly conductive reduced graphene oxide (rGO) to afford CTF/rGO hybrids. The subsequent pyrolysis gives sandwich-like NHC/rGO composites, which, synergistically integrate respective advantages of both components of NHC and rGO, thus offering excellent electrocatalytic performance for oxygen reduction reaction (ORR). Significantly, the resultant NHC/rGO-950 exhibits a more positive onset and half-wave potential, higher diffusion-limited current density and better long-term stability than the state-of-the-art Pt/C and is among the best of previously reported metal-free electrocatalysts, in alkaline solution. Such rGO-templated NHC based on CTFs offers a promising strategy to the design of highly efficient metal-free ORR electrocatalysts for fuel cells.

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Publication details

The article was received on 21 Aug 2017, accepted on 10 Oct 2017 and first published on 10 Oct 2017


Article type: Paper
DOI: 10.1039/C7TA07387A
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    From Covalent Triazine-based Framework to N-doped Porous Carbon/Reduced Graphene Oxide Nanosheets: Efficient Electrocatalysts for Oxygen Reduction

    L. Jiao, Y. Hu, H. Ju, C. Wang, M. Gao, Q. Yang, J. Zhu, S. Yu and H. Jiang, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA07387A

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